| 1 | Apollo Operating LLC | | Oil & Gas Operator | Sep 2013 |
| 2 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2024 |
| 3 | Blackrock Energy Corp | | Oil Operator | Jan 2024 |
| 4 | Consolidated Resources Inc | | Oil & Gas Operator | May 2004 |
| 5 | DJ Resources Inc | Bowie, TX 76230 | Oil & Gas Operator | Nov 2017 |
| 6 | Edge Energy II LLC | Golden, CO 80401 | Oil & Gas Operator | Mar 2024 |
| 7 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Dec 2023 |
| 8 | Extraction Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
| 9 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 10 | Magpie Operating, Inc | | Oil & Gas Operator | Feb 2024 |
| 11 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Feb 2024 |
| 12 | McWhinney Holding Company LLLP | | Oil & Gas Operator | Mar 2021 |
| 13 | Monahan* Rex Family Trust | | Oil & Gas Operator | Sep 2010 |
| 14 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 15 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 16 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Jan 2024 |
| 17 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Mar 2024 |
| 18 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 19 | Prospect Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 20 | Ranchers Exploration Partners LLC | | Oil & Gas Operator | Jan 2015 |
| 21 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Jan 2024 |
| 22 | Shepler & Thomas, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Dec 2011 |
| 23 | Skaer Properties LTD Partnership | | Oil & Gas Operator | Jun 2013 |
| 24 | Smith Oil Properties Inc | | Oil & Gas Operator | Nov 2022 |
| 25 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2024 |
| 26 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | Feb 2024 |
| 27 | Synergy Resources Corporation | | Oil & Gas Operator | Oct 2022 |
| 28 | Tamco Drilling Inc | | Oil & Gas Operator | Apr 2003 |
| 29 | Timka Resources LTD | | Oil & Gas Operator | Feb 2024 |
| 30 | Tom Fenno Production LLC | | Oil Operator | Nov 2019 |
| 31 | Unioil | Denver, CO 80203 | Oil & Gas Operator | Jun 2012 |
| 32 | Wellington Operating Company | | Oil & Gas Operator | Jan 2024 |
| 33 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |